Omron E5EK, User Manual

Page: 87 / 203

4.9 How to Use the Heater Burnout Alarm
E5EK
4--25
Example 1 : when using a 200 VAC, 1 kW heater
Current at normal operation =
1000
200
= 5A (
<
10A)
Current at heater burnout = 0A
Set value =
5+0
2
= 2.5A
(current at normal operation-current at heater burnout
= 5 - 0 = 5A (
≧
1A)
Example 2 : when using three 200 VAC, 1 kW heaters
Set value =
Current at normal operation =
1000
200
×
3 = 15A (
≧
10A)
Current at burnout of one heater =
1000
200
×
2 = 10A
15+10
2
= 12.5A
(current at normal operation-current at heater burnout
= 15 - 10 = 5A (
≧
2.5A)
Symbol Parameter Name: Mode
Description
Heater current monitor : Level 1 Heater current value monitor
Heater burnout detection : Level 1 Heater burnout detection
Heater burnout latch : Option Heater burnout detection alarm latch
F
Examples of use
15
Control output
17
Heater
1KW
AC200V
CT
E5EK-T
15
Control output
17
Heater
1KWx3
AC200V
CT
E5EK-T
Parameters